@article{02172775,
title = {The American put option close to expiry.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {73},
year = {2004},
pages = {161-174},
zbl = {1108.91041},
language = {en},
url = {http://dml.mathdoc.fr/item/02172775}
}
Mallier, R.; Alobaidi, G. The American put option close to expiry.. Acta Mathematica Universitatis Comenianae. New Series, Tome 73 (2004) pp. 161-174. http://gdmltest.u-ga.fr/item/02172775/